You can still find installers for the core software (Express, Studio, Fusion) on the official MixMeister site NewBlue Support:
The NewBlue DJ Suite was primarily marketed as an add-on for MixMeister Fusion MixMeister Studio newblue dj suite for mixmeister download top
To download and install the NewBlue DJ Suite for MixMeister, follow these steps: You can still find installers for the core